350-801 Question #143: Real Exam Question with Answer & Explanation

Question

An engineer deploys a Cisco Expressway edge server for a customer who wants to utilize all feature on the server. Which feature does the engineer configure on the Expressway edge?

Options

• AVTC bridge
• BH.323 endpoint registration
• CSIP gateway for PSTN providers
• DMRA

Explanation

To fully utilize a Cisco Expressway-E server, an engineer configures Mobile and Remote Access (MRA). MRA enables external users to register their Cisco IP Phones and Jabber clients to Cisco Unified Communications Manager for voice, video, and collaboration services securely over the internet.

Common mistakes.

• A. A VTC (Video Teleconferencing) bridge is a media resource for multi-point video conferences, typically provided by dedicated hardware or software (e.g., Cisco Meeting Server), not directly a feature of Expressway-E.
• B. While Expressway can facilitate H.323 calls, direct H.323 endpoint registration is primarily handled by gatekeepers or CUCM for internal endpoints, and Expressway's role is more about traversal for various protocols, not direct H.323 endpoint registration on the edge itself.
• C. A SIP gateway for PSTN providers is typically implemented on a Cisco IOS gateway or a dedicated Session Border Controller (SBC) that connects to the PSTN, not a core function of Expressway-E.

Concept tested. Cisco Expressway-E features - MRA

Reference. https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/expressway/config_guide/X14-0/mra/mra_deployment_guide_X14-0.html

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